posted May 8, 2018, 10:59 AM by Tsai-Tsai O-Lee
[
updated May 8, 2018, 11:02 AM
]
posted Jan 5, 2018, 6:09 PM by Tsai-Tsai O-Lee
[
updated Jan 5, 2018, 6:09 PM
]
February 1, 2018UCLA Luskin Conference Center
|
posted Nov 2, 2017, 1:08 PM by mschwartz@tanms-erc.org
[
updated Jan 5, 2018, 5:22 PM by Tsai-Tsai O-Lee
]
2018 Annual Research Strategy Meeting Controlling Magnetism & Functional Phonons in the Small Scale
January 30-31, 2018 UCLA Luskin Conference Center
|
posted Aug 18, 2016, 3:38 PM by Tsai-Tsai O-Lee
[
updated Aug 19, 2016, 4:52 PM
]
2016 Annual Research Strategy Meeting for Multiferroic Meso-Micro RF Devices
November 15, 2016 @ UCLA
|
posted Aug 17, 2016, 1:08 PM by Tsai-Tsai O-Lee
[
updated Aug 18, 2016, 2:36 PM
]
 |
Xavier Marti, Ph.D.
Institute of Physics of the Czech Academy of Sciences
Owner and Chief Technical Officer at IGSresearch Ltd.
igsresearch.com/spintronics
|
Seminar 1 - Thursday, August 25, 2016, 10:00am PDT
Electrical switching of an antiferromagnet
Louis Néel pointed out in his Nobel lecture that while abundant and interesting from theoretical viewpoint, antiferromagnets did not seem to have any applications. Indeed, the alternating directions of magnetic moments on individual atoms and the resulting zero net magnetization make antiferromagnets hard to control by tools common in ferromagnets. Strong coupling would be achieved if the externally generated field had a sign alternating on the scale of a lattice constant at which moments alternate in antiferromagnets. However, generating such a field has been regarded unfeasible, hindering the research and applications of these abundant magnetic materials. Theoreticians have recently predicted that relativistic quantum mechanics may offer staggered current induced fields with the sign alternating within the magnetic unit cell which can facilitate a reversible switching of an antiferromagnet by applying electrical currents with comparable efficiency to ferromagnets. Among suitable materials is a high Néel temperature antiferromagnet, tetragonal-phase CuMnAs, which we have recently synthesized in the form of single-crystal epilayers structurally compatible with common semiconductors. We demonstrate electrical writing and read-out, combined with the insensitivity to magnetic field perturbations, in a proof-of-concept antiferromagnetic memory device which operates USB-powered at room temperature.
Seminar 2 - Friday, August 26, 2016, 10:00am PDT
Publishing invoices using spintronics
While I was a student and a post-doc, I got the feeling that spintronics was limited to data storage and random access memories. And so I was preparing my applications to start my senior academic career in 2013. I was aware that magnetic sensors had numerous applications but to some extend there was not enough “new research” to be done as to justify starting a new academic group. In this talk, I will walk through the business activities I took part in the past 3 years by which I fund some of my subsequent personal scientific research in spintronics using a couple of successful applications of magnetic sensors.
A majority of scientists have a natural skill for managing large data sets, modelling and connecting the dots. In this talk, I will discuss the additional ingredients needed to turn this “mental integration ability and creativity” of scientists into invoices - the key paper. One often forgotten and misunderstood ingredient is the internet. It brings a tremendous additional value to any gadget simply because it is connected: One dollar becomes ten dollars, if the data flows properly into an iPad.
On a more general frame, I will discuss how such small start-ups can be a feasible path to partially fund fundamental academic research. Scientific groups and its concomitant technology transfer departments operate nowadays in an imposed short-termism and, eventually, short-budgetism. For instance, It is very hard to achieve a significant success in revolutionizing the magnetic data storage market when, on one side, standard cycles are limited to 3~5 years and budgets to 1~5 million while the target is to attract the attention of 30 year old multinational companies. We will discuss several strategies that I have witnessed to tackle these challenges and I would like to brainstorm briefly on alternative paths and, specially, those ones which UCLA is currently following.
|
posted Sep 1, 2015, 9:59 AM by Tsai-Tsai O-Lee
[
updated Sep 1, 2015, 10:00 AM
]
WHEN: Tuesday, October 20, 2015 WHERE: UCLA California NanoSystems Institute WEBSITE: http://arsm.tanms-erc.org
Please join TANMS as we host distinguished experts from government, industry, and academia at UCLA’s California NanoSystems Institute (CNSI) to discuss topics pertaining to state-of-the-art multiferroic materials and applications involving: • Magnetic Sensing
• Panel Discussions
• Transmit/Receive Antennas
• Phase Filters
• RF Antenna Components
Academia - Industry
- Research Labs
|
posted Mar 13, 2015, 5:24 PM by Tsai-Tsai O-Lee
[
updated Sep 1, 2015, 10:02 AM
]
Apil 9, 2:00 pm, UCLA Engineering IV, Tesla Room (53-125)"Piezoelectric Films for Microelectromechanical Systems"
Prof. Susan Trolier-McKinstry Materials Research Institute Penn State University
ABSTRACT:
Piezoelectric thin films are of increasing interest in low voltage microelectromechanical systems (MEMS) for sensing, actuation, and energy harvesting. They also serve as model systems to study fundamental behavior in piezoelectrics. The seminar will discuss how materials are optimized for these applications, as well as examples of the use of piezoelectric films over a wide range of length scales. The key figures of merit for actuators and energy harvesting will be discussed, with emphasis on how to achieve these on practical substrates. For example, control of the domain structure of the ferroelectric material allows the energy harvesting figure of merit for the piezoelectric layer to be increased by factors of 4 – 10. Likewise, control of crystallographic orientation and substrate clamping enables large increases in the figure of merit for actuators. To illustrate the functionality of these films, examples of integration into MEMS structures will also be discussed, including adaptive optics for X-ray telescopes, low frequency and non-resonant piezoelectric energy harvesting devices, and piezoelectronic transistors as a potential replacement for CMOS electronics.
Susan Trolier-McKinstry is a professor of ceramic science and engineering, director of the W. M. Keck Smart Materials Integration Laboratory, and co-director of the Nanofabrication facility at the Pennsylvania State University. Her main research interests include thin films for dielectric and piezoelectric applications. She is a fellow of the American Ceramic Society, an academician of the World Academy of Ceramics, a fellow of IEEE, and a member of the Materials Research Society. She currently serves as an associate editor for Applied Physics Letters, the Journal of the American Ceramic Society, and the IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. Twenty people that she has advised/co-advised have gone on to take faculty positions around the world. |
posted Mar 13, 2015, 5:18 PM by Tsai-Tsai O-Lee
[
updated Sep 16, 2015, 12:58 PM
]
TANMS IAB Meeting: Monday, April 27, 2015NSF Site Review Visit: Tuesday-Thursday, April 28-30, 2015 WHERE: UCLA, California NanoSystems Institute (CNSI) |
posted Sep 5, 2014, 12:25 PM by Tsai-Tsai O-Lee
[
updated Sep 16, 2015, 12:59 PM
]
WHEN: Thursday, November 13, 2014 WHERE: University of California, Los Angeles
|
|
